Interatomic potentials between noble gas and Ag atoms from axial surface channeling

Schüller, A.; Winter, H.

doi:10.1016/j.nimb.2007.03.087

Cited by 12 publications

(7 citation statements)

References 14 publications

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“…Grazing scattering from metal surfaces was successfully described by superposition of pair potentials for a silver surface 63 and by adding to a pair potential an embedding potential for atoms in the electron gas in front of an aluminum surface. 64 For the ionic crystal LiF ͑Ref.…”

Section: Resultsmentioning

confidence: 99%

Diffraction of fast atoms during grazing scattering from the surface of an ultrathin silica film on Mo(112)

et al. 2010

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He atoms and H 2 molecules with energies of 2 keV are scattered under grazing angles of incidence ranging from 0.2°to 1.8°from the surface of a monolayer silica film grown on a Mo͑112͒. We observe for scattering along low indexed atomic strings in the topmost surface layer pronounced diffraction pattern owing to diffraction effects for the elastically scattered projectiles. The diffraction patterns are analyzed in terms of semiclassical trajectory calculations making use of interaction potentials derived from density-functional theory. We find good agreement with the experiments, for a two-dimensional ͓Si-O-Si͔ network structural model for the ultrathin silica film.

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Section: Resultsmentioning

confidence: 99%

Diffraction of fast atoms during grazing scattering from the surface of an ultrathin silica film on Mo(112)

et al. 2010

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“…12͒. In recent studies, 59,62 we have demonstrated that the OCB potential is more adequate for grazing scattering of fast atoms than the "universal potential" proposed by Ziegler, Biersack, and Littmark 53 ͑ZBL, dasheddotted green curves in Fig. 12͒, which was found to be too repulsive at large internuclear distances r. ZBL as well as OCB are two prominent examples of generalized potentials, which provide analytic functions with respect to the internuclear distance r and the atomic numbers Z 1 and Z 2 .…”

Section: E Vertical Positions Of Adsorbed Oxygen Atomsmentioning

confidence: 98%

Superstructures of oxygen and sulphur on a Fe(110) surface via fast atom diffraction

et al. 2009

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Fast helium atoms and hydrogen molecules with energies from 400 eV up to several keV are grazingly scattered from a Fe͑110͒ surface covered by oxygen and sulphur atoms forming c͑2 ϫ 2͒ and c͑1 ϫ 3͒ superstructures, respectively. For scattering along low-index azimuthal directions we observe defined diffraction patterns in the angular distributions for scattered projectiles. From the evaluation of those diffraction patterns we derive the widths of low-indexed axial channels, the corrugation of the interaction potential across these channels, and the normal positions of adsorbed atoms above the Fe lattice. Our analysis is based on semiclassical models using hard-wall approximation as well as individual potentials for the interaction of projectiles with the surface. By comparing the results of different models, we discuss the robustness of the information on the geometrical structure of the surfaces.

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“…The shape of these 2D spectra strongly varies with the incidence direction, showing energy-loss peaks associated with rainbow scattering only for the [1 10] and [001] channels. Notice that while energy-loss structures give information about the electronic density along the channel, the angular positions of rainbow peaks depend on the corrugation of the surface potential across the incidence direction [37][38][39][40]. Thus, experiments in coincidence, measuring simultaneously angular and energy-loss distributions with a certainly high energy resolution, might provide useful insights on the atom-surface interaction.…”

Section: Resultsmentioning

confidence: 99%

Trajectory-dependent energy loss for swift He atoms axially scattered off a silver surface

Rubiano

Bocan

Juaristi

et al. 2014

Nuclear Instruments and Methods in Physics Research Section B:

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Angle-and energy-loss-resolved distributions of helium atoms grazingly scattered from a Ag(110) surface along low indexed crystallographic directions are investigated considering impact energies in the few keV range. Final projectile distributions are evaluated within a semi-classical formalism that includes dissipative effects due to electron-hole excitations through a friction force. For monoenergetic beams impinging along the [110], [112] and [110] directions, the model predicts the presence of multiple peak structures in energy-loss spectra. Such structures provide detailed information about the trajectory-dependent energy loss. However, when the experimental dispersion of the incident beam is taken into account, these energy-loss peaks are completely washed out, giving rise to a smooth energy-loss distribution, in fairly good agreement with available experimental data.

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Interatomic potentials between noble gas and Ag atoms from axial surface channeling

Cited by 12 publications

References 14 publications

Diffraction of fast atoms during grazing scattering from the surface of an ultrathin silica film on Mo(112)

Diffraction of fast atoms during grazing scattering from the surface of an ultrathin silica film on Mo(112)

Superstructures of oxygen and sulphur on a Fe(110) surface via fast atom diffraction

Trajectory-dependent energy loss for swift He atoms axially scattered off a silver surface

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